Ventilation

VE-01

Flow Rate (Q = AV)

ASP CSP Foundational

Calculate volumetric airflow rate in ducts and hoods. The most fundamental ventilation equation.

VE-02

Air Velocity from Velocity Pressure

ASP CSP Foundational

Convert velocity pressure measurement (from a Pitot tube) to air velocity.

VE-03

Total Pressure

ASP CSP Foundational

Relate the three pressure measurements in a ventilation duct.

VE-04

Hood Flow Rate

ASP CSP Advanced

Calculate airflow through a hood opening using hood static pressure and entry coefficient.

VE-05

Fan Static Pressure

ASP CSP Advanced

Calculate fan static pressure — the net pressure a fan must provide to move air through the system.

VE-06

Hood Static Pressure

ASP CSP Advanced

Calculate hood static pressure as the sum of velocity pressure and entry losses.

VE-07

Hood Entry Loss

ASP CSP Advanced

Calculate energy loss at the hood entry due to turbulence and flow contraction.

VE-08

Hood Entry Coefficient (Ce)

ASP CSP Advanced

Calculate the hood entry coefficient from measured pressures. Measures hood efficiency.

VE-09

Unflanged Hood Capture Velocity

ASP CSP Advanced

Calculate airflow needed to achieve a target capture velocity at a specific distance from an unflanged hood opening.

VE-10

Flanged Hood Capture Velocity

ASP CSP Advanced

Calculate airflow for a flanged hood. Flanges reduce required airflow by ~25% compared to unflanged hoods.

VE-11

Dilution Ventilation Rate (from TLV)

ASP CSP Advanced

Calculate dilution ventilation flow rate needed to control vapor concentration below the TLV.

VE-12

Dilution Ventilation Rate (from Solvent)

ASP CSP Advanced

Calculate dilution air needed to control airborne concentration from an evaporating liquid, accounting for mixing.

VE-13

Effective Ventilation Rate

ASP CSP Advanced

Adjust actual ventilation rate for imperfect mixing using safety factor K.

VE-14

Saturation Concentration

ASP CSP Advanced

Calculate maximum equilibrium concentration of a vapor based on vapor pressure and atmospheric pressure.

VE-15

Purge Time (Contaminant Removal)

ASP CSP Advanced

Calculate time required to reduce contaminant concentration from C₁ to C₂ once generation has stopped.